Ruelco RQ-2 User manual

‘RQ-2’ QUICK EXHAUST
MODEL 1801
OPERATION MANUAL
MANUAL # OMP - 1801 - 03 - 99
(SEE SPEC. SHEET 1801)
I. PRINCIPLE OF OPERATION
•Pliers to remove the spool assembly
The Ruelco ‘RQ-2’ is a high pressure
quick exhaust valve used to operate
large hydraulic pistons by quickly
venting cylinder hydraulic pressure
through the bleed port for fast action.
Loss of upstream hydraulic pressure
moves the spool assembly, resulting in
rapid exhaust of cylinder pressure.
Resupply of upstream pressure moves
the spool assembly; resulting in
resealing of the bleed port and thereby
reopening the cylinder.
from the body.
•Suitable adjustable wrench for
unthreading the seat.
1) To replace O-rings on the spool
assembly (Item 7), the valve has to
be completely disassembled.
2) Unthread the cap (Item 1).
3) Use the pliers to pull the spool
assembly (Item 7) out.
II. INSTALLATION 4) The seals on the spool assembly may
now be replaced as per instructions
given in the repair section of this
manual.
The ‘RQ-2’ can be mounted either
vertically, horizontally, or supported by
piping from any of its ports. If it is
supported by piping, care should be
taken that the strength of the pipe fittings
used is adequate to prevent the fitting
from breaking off in the valve body
should the valve be inadvertently struck.
5) Unthread the seat (Item 11) and
remove the ball (Item 5) and the
spring (Item 6).
IV. REPAIR AND ASSEMBLY
Proper pipe thread sealant should be
used on any pipe fittings threaded into
the valve ports. If stainless steel fittings
are used, a sealant that will prevent
galling is required.
1) Remove the seals from the spool
assembly and the body seal from the
cap.
2) Using an appropriate safety solvent,
clean all parts.
III. DISASSEMBLY (REFER TO 3) Inspect the shaft assembly for any
major damage such as burrs, knicks.
Also, inspect it for straightness.
Replace the shaft assembly if
damaged.
SPEC. SHEET 1801)
•Suitable adjustable wrench for
removing the cap.
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4) Examine the valve body for any
damage such as burrs, nicks, etc.
Replace if damaged.
5) Examine the ball (Item 5) and seat
(Item 11) and replace if worn-out.
6) Replacement seals from a Ruelco
product repair kit are required for
proper valve performance. It is
recommended that all seals be
lubricated before and after
installation with a high quality
silicon base grease.
7) Lubricate the body seal (Item 2) and
install on the cap (Item 1).
8) Lubricate the shaft O-rings and
install on the spool assembly along
with the teflon back-ups (Item 10).
9) Lightly lubricate the bores in the
valve body (Item 8).
10) Lubricate the seat O-ring (Item 3)
and install on the seat (Item 11).
11) Push the spring (Item 6) inside the
spool (Item 7) and thread the seat
(Item 11) along with the ball
(Item 5) onto the spool.
12) Push the spool-assembly (Item 7)
inside the valve body (Item 8).
13) Thread the cap (Item 1) onto the
valve body (Item 8).
V. RECOMMENDED MAINTENANCE
PROCEDURE INTERVAL
Operate Manually. Every 30 days.
Disassemble, inspect and lubricate. Yearly or as required.
Replace all seals. Every two (2) years or as required.
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